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Tuesday, July 28, 2020 | History

2 edition of System of zirconium-tantalum alloys zirconium rich portion found in the catalog.

System of zirconium-tantalum alloys zirconium rich portion

Roderic Emil Kleint

System of zirconium-tantalum alloys zirconium rich portion

by Roderic Emil Kleint

  • 110 Want to read
  • 15 Currently reading

Published .
Written in English

    Subjects:
  • Zirconium.,
  • Tantalum.,
  • Alloys -- Analysis.

  • Edition Notes

    Statementby Roderic Emile Kleint.
    The Physical Object
    Pagination61 leaves, bound :
    Number of Pages61
    ID Numbers
    Open LibraryOL14305393M

    This study aimed to create novel bioceramic coatings on a titanium alloy and evaluate their surface properties in comparison with conventional prosthetic materials. The highly polished titanium alloy Ti6Al4V (Ti) was used as a substrate for yttria-stabilized zirconium oxide (3YSZ) and lithium disilicate (LS2) coatings. They were generated using sol-gel strategies. In comparison, highly. The constitution of zirconium-uranium alloys is discussed, and a constitutional diagram for the system is presented. The effects of oxygen and nitrogen, which are present in these alloys as contaminants, on alloy constitution ars shownin the more» form of ternary diagrams and in terms of their quantitative effects on the phases present.

    aration of this book. Zirconium-base alloys, primarily Zircaloy-2 and Zircaloy-4, are used as both fuel rod cladding, structural, and other components in the cores of light-water nuclear power reactors. In addition, zirconium-base alloys are em­ ployed as the pressure tube material in heavy-water reactors. In the Zr-rich portion of the Zr-Ga phase diagram, the alpha / beta phase boundaries of Zr are depressed by additions of Ga andmore» The Cd pressures of alpha - and beta - Zr alloys containing 1 to 11% Cd were measured between and deg K. Crystal structures of several unreported transition-metal fluorides, rare-earth hydrides and.

    Zirconium (Zr) is an important alloying element to Mg-Zn-based alloy system. In this paper, we report the formation of the β-type precipitates on the nanoscale Zr-rich particles in a Mg-6ZnCuZr alloy during ageing at °C. Scanning transmission electron microscopy examinations revealed that the nanoscale Zr-rich []α rods/laths are dominant in the Zr-rich core regions of the as. Binaries with zirconium: solid phase relations from °C°C for alloys containing up to 32 w/o zirconium. Binaries with niobium: uranium-rich portion of the diagram below the solidus. Zirconium-niobium ternaries: phase relationships below the solidus for the uranium-rich .


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System of zirconium-tantalum alloys zirconium rich portion by Roderic Emil Kleint Download PDF EPUB FB2

The present authors s modified the tantal- um-zirconium system of WILLIAMS ealloys containing more than 80 wt.% tantalum. The tungsten-zirconium system has been described by DoMAGALA, McPHERSON AND HANSEN^". An intermetallic compound, WzZr, forms peritectically at ^ Cited by: 2.

INTRODUCTION ONLY fragmentary information on the zirconium-tantalum system is available from published literature. ANDERSON et al.(') investigated cast alloys of zirconium with tantalum contents of up to per cent. The alloys were made in graphite crucibles under vacuum from sponge zirconium and sheet by: 2.

System of zirconium-tantalum alloys zirconium rich portionAuthor: Roderic Emil Kleint. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link).

Reactive metals and their alloys are used in a variety of biomedical applications from pace makers to hips implants. This new ASTM publication provides the latest developments on these alloys, their processing techniques for medical applications, characterization of fundamental materials properties critical to their use for biomedical applications, and evaluation of biological and clinical.

To fabricate the uranium alloys, including2, 5, 10, 20, 30, 40, and 50 wt% zirconium, high-purity zirconium crystal bars and nitric acid-washed depleted uranium chunks were melt-cast in cylindrical yttrium oxide crucibles at ∼ °C for 1 h, followed by cooling in a furnace to 25 °C at a rate of 30 °C/min under an argon atmosphere Cited by: Interaction of boron nitride with titanium, zirconium, hafnium, zirconium nitride, and zirconium boride was studied using highpressed powder mixtures within the range of temperatures to   A tentative phase diagram Zr-Te system is given in Fig.

with a detailed part of it in Fig. Compared to the earlier reported Zr-Te phase diagram [61, significant changes have been made to the reported melting and decomposition temperatures, and the zirconium-rich part. 67Geb: E. Gebhart, J.

Rexer, and G. Petzow, “The Zirconium-Tantalum-Chromium System, “Phase Equilibria in Zirconium-Rich Zirconium-Chromium-Oxygen Alloys, “Tempering of a Beta Quenched Zr wt.% Cr Alloy.

Part 2. ZrCr 2 Precipitation. The metastable constitution and superconducting transition temperature have been studied for a series of Zr Ta alloys over the composition range from. It is concluded that in the zirconium alloy system, by virtue of the physical peculiarities of the System, it is easier to reach unambiguous conclusions about the environmental cracking mechanisms.

Uranium–zirconium, uranium niobium, and uranium–zirconium–niobium alloys were synthesized by the arc melting technique and their phase transition temperatures were determined using a high temperature calorimeter. Heat capacities of U–7 wt%Zr, U–7 wt%Nb, U–5 wt%Zr–2 wt%Nb, U– wt%Nb– wt%Zr, and U–2 wt%Zr–5 wt%Nb were measured using a differential scanning calorimeter.

Spark Plasma Sintering (SPS) is used to fabricate Titanium-Niobium-Zirconium-Tantalum alloy (TNZT) powder—based bioimplant components with controllable porosity.

The developed densification maps show the effects of final SPS temperature, pressure, holding time, and initial particle size on final sample relative density.

Correlations between the final sample density and mechanical properties. Melt-spun amorphous zirconium-rich Fe Zr alloys with metalloid additions (B, Si) and mechanically alloyed amorphous Fe Zr powders were investigated by X-ray diffraction and Mössbauer spectroscopy.

Zirconium alloys seem to be the most suitable for use in fuel cladding, if they can overcome the rapid oxidation at temperature higher than °C. Previous studies on the oxidation behavior for some Zr-alloys nuclear fuel cladding tubes in steam and steam–air atmospheres at high temperatures are.

Alloys containing 20 to 60 percent Nb, Zr, or Ti are better but they tend to decompose into two or three crystalline forms with an accompanying change in chemical composition towards the niobium, zirconium, and titanium rich portion of the ternary system.

The uranium--niobium binary system exhibits a continuous series of solid solutions above deg C. At lower temperatures a miscibility gap exists, containing a niobium-rich and a uranium-rich body-centered cubic phase.

A monotectoid transformation occurs at deg C. The beta-uranium phase is. The addition of silicon to uranium-zirconium alloys is accompanied by the formation of Zr/Si which alters the alloy constitution by removing zirconium from solution.

Below more» deg C, uranium-silicon-rich alloys with small amounts of zirconium contain the suitable allotropic form of uranium plus Zr/sub 3/Si/sub 3/ and U/sub 3/Si.

The zirconium-rich region of the Zr-Sn system below °C was studied by scanning electron microscopy, electrical resistivity, electron microanalysis and optical microscopy.

The reaction of zinc vapor with Zircaloy-4 and nuclear grade zirconium was investigated with various analytical techniques: optical metallography, scanning electron microscopy (SEM), and transmission electron microscopy (TEM).

Based on the results, the Zr-rich part of the Zn-Zr phase diagram was revised. A eutectoid decomposition of (βZr) occurs at ±6 °C with a composition of xZr=. A class of amorphous metal alloys is provided in which the alloys are rich in iron, nickel, cobalt, chromium and/or manganese.

These alloys contain at least one element from each of three groups of elements and are low in metalloids compared to previously known liquid quenched amorphous alloys rich in iron, nickel, cobalt, chromium and/or manganese.This specification covers plate consisting of a base metal to which is bonded, integrally and continuously, on one or both sides a layer of one of the following: titanium, zirconium, tantalum, niobium, and their alloys.

The material generally is intended for pressure vessel use.However, small panticles of metallic phases rich in zirconium or niobium, produced by selective leaching of a more reactive uranium-rich phase, can enter into violently explosive reactions.

The conditions under which explosions with zirconium-bearing alloys may be expected during chemical reprocessing have been defined in the literatare.